package gnu.jpdf;

import java.awt.HeadlessException;
import java.awt.print.Book;
import java.awt.print.PageFormat;
import java.awt.print.Pageable;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.awt.print.PrinterJob;
import java.io.File;
import java.io.FileOutputStream;
import java.util.Locale;
import javax.print.attribute.HashPrintRequestAttributeSet;
import javax.print.attribute.IntegerSyntax;
import javax.print.attribute.PrintRequestAttributeSet;
import javax.print.attribute.TextSyntax;
import javax.print.attribute.standard.Copies;
import javax.print.attribute.standard.JobName;
import javax.print.attribute.standard.RequestingUserName;
import javax.swing.JFileChooser;

/**
 * <p>
 * This class extends awt's PrinterJob, to provide a simple method of writing
 * PDF documents.
 * </p>
 *
 * <p>
 * You can use this with any code that uses Java's printing mechanism. It does
 * include a few extra methods to provide access to some of PDF's features like
 * annotations, or outlines.
 * </p>
 *
 * @author Gilbert DeLeeuw, gil1@users.sourceforge.net
 */
public class PDFPrinterJob extends PrinterJob {

    /**
     * The file chooser
     */
    private static JFileChooser fileChooser;

    /**
     * Printing options;
     */
    private PrintRequestAttributeSet attributes;

    /**
     * PDF document properties
     */
    private PDFInfo info;

    /**
     * A pageable, or null
     */
    private Pageable pageable = null;

    /**
     * Page format.
     */
    private PageFormat pageFormat;

    /**
     * The Printable object to print.
     */
    private Printable printable;

    /**
     * The actual print job.
     */
    private PDFJob printJob;

    /**
     * Initializes a new instance of <code>PDFPrinterJob</code>.
     */
    public PDFPrinterJob() {
        attributes = new HashPrintRequestAttributeSet();
        info = new PDFInfo();
        pageFormat = new PageFormat(); // default page format.
        setJobName("Java Printing");
    }

    @Override
    public void cancel() {
        // Cancel is not an option
    }

    @Override
    public PageFormat defaultPage(PageFormat page) {
        return validatePage(page);
    }

    @Override
    public int getCopies() {
        return ((IntegerSyntax) attributes.get(Copies.class)).getValue();
    }

    @Override
    public String getJobName() {
        return ((TextSyntax) attributes.get(JobName.class)).getValue();
    }

    public static PrinterJob getPrinterJob() {
        return new PDFPrinterJob();
    }

    @Override
    public String getUserName() {
        return ((TextSyntax) attributes.get(RequestingUserName.class))
                .getValue();
    }

    @Override
    public boolean isCancelled() {
        return false;
    }

    @Override
    public PageFormat pageDialog(PageFormat page) throws HeadlessException {
        // No page dialog is supported.
        return (PageFormat) page.clone();
    }

    /**
     * Prints a set of pages.
     *
     * @param pathname the full path for the output PDF file.
     * @exception PrinterException an error in the print system caused the job
     * to be aborted.
     * @see Book
     * @see Pageable
     * @see Printable
     */
    public void print(String pathname) throws PrinterException {
        int pageCount;
        File file = null;
        FileOutputStream fileOutputStream = null;

        try {
            file = new File(pathname);
            fileOutputStream = new FileOutputStream(file);
        } catch (Exception e) {
            System.err.println("Error!! - Invalid output file path: "
                    + pathname);
        }

        PDFGraphics pdfGraphics = null;
        printJob = new PDFJob(fileOutputStream);

        if (info != null) {
            printJob.getPDFDocument().setPDFInfo(info);
        }

        pageCount = pageable.getNumberOfPages();
        for (int pageIndex = 0; pageIndex < pageCount; pageIndex++) {
            pageFormat = pageable.getPageFormat(pageIndex);

            pdfGraphics = (PDFGraphics) printJob.getGraphics(pageFormat);
            printable = pageable.getPrintable(pageIndex);
            printable.print(pdfGraphics, pageFormat, pageIndex);
            pdfGraphics.dispose();
        }

        printJob.end();

    }

    @Override
    public void print() throws PrinterException {
        File file;
        File path;
        String jobName = getJobName();

        if (fileChooser == null) {
            fileChooser = new JFileChooser();
            fileChooser.setMultiSelectionEnabled(false);
            fileChooser.setFileSelectionMode(JFileChooser.FILES_ONLY);
        }

        // Make sure job name is not blank
        if (jobName.equals("")) {
            jobName = "Java Printing";
        }
        // Eliminate invalid characters from job name.
        jobName = jobName.replaceAll("\\\\", "-");
        jobName = jobName.replaceAll("/", "-");

        path = fileChooser.getCurrentDirectory();
        file = new File(path, jobName + ".pdf");

        // Dialog to get file name...
        fileChooser.setSelectedFile(file);

        // Print
        if (fileChooser.showSaveDialog(null) == JFileChooser.APPROVE_OPTION) {
            file = fileChooser.getSelectedFile();
            print(file.getAbsolutePath());
        }
    }

    @Override
    public boolean printDialog() throws HeadlessException {
        return true;
    }

    /**
     * Sets the author for this document.
     *
     * @param author the author's name.
     */
    public void setAuthor(String author) {
        info.setAuthor(author);
    }

    @Override
    public void setCopies(int copies) {
        // Will be ignored, but add attribute anyway
        attributes.add(new Copies(copies));
    }

    /**
     * Sets the creator for this document.
     *
     * @param creator the application name.
     */
    public void setCreator(String creator) {
        info.setCreator(creator);
    }

    @Override
    public void setJobName(String jobName) {
        attributes.add(new JobName(jobName, Locale.getDefault()));

        if (info.getTitle() == null) {
            info.setTitle(jobName);
        }
    }

    @Override
    public void setPageable(Pageable document) throws NullPointerException {
        if (document == null) {
            throw new NullPointerException("Pageable cannot be null.");
        }
        this.pageable = document;
    }

    @Override
    public void setPrintable(Printable painter) {
        this.printable = painter;
    }

    @Override
    public void setPrintable(Printable painter, PageFormat format) {
        this.printable = painter;
        this.pageFormat = format;
    }

    /**
     * Sets the title for this document.
     *
     * @param title the document title.
     */
    public void setTitle(String title) {
        info.setTitle(title);
    }

    @Override
    public PageFormat validatePage(PageFormat page) {
        return (PageFormat) page.clone();
    }

}